Codeforces Round #473 (Div. 2) C. Mahmoud and Ehab and the wrong algorithm
Divide by Zero 2018 and Codeforces Round #474 (Div. 1 + Div. 2, combined) B. Minimize the error
Educational Codeforces Round 43 (Rated for Div. 2) C. Nested Segments
Codeforces Round #479 (Div. 3) E. Cyclic Components
Word Break II
Jump Game Array
Min Sum Path in Triangle
Word Break
Unique Binary Search Trees II